Windows 10: Something causing high DPC (User process and at times a driver)

  1.    25 Feb 2016 #1

    Something causing high DPC (User process and at times a driver)


    Have noticed that i seem to get sky high DPC at soem occasions.
    I haven't really suffered from anything before, but recently i had some audio glitches which i haven't been able to reproduce.
    As i have overclocked recently with offset voltage i though that might be the cause, however as said i cannot reproduce the audio glitch, might have been something interfering (it was huge glitch though, though it was gonna crash, happened like 2-3 times).

    Anyhow, i have tried non-OC as well, but looking at my DPC it seems that it always gets high for some reason.

    Especially the User process. Driver has become high, but hasn't confirmed that without OC (it's a bit rarer, and i think it's USB driver, though no idea why).

    Click image for larger version. 

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    This is with no overclock, just the default BIOS settings, with only some stuff disabled (USB 3.0, etc, and HDD set to AHCI).

    ____________________________________________________________________________________________________ _____CONCLUSION
    ____________________________________________________________________________________________________ _____
    Your system appears to be having trouble handling real-time audio and other tasks. You are likely to experience buffer underruns appearing as drop outs, clicks or pops. One problem may be related to power management, disable CPU throttling settings in Control Panel and BIOS setup. Check for BIOS updates.
    LatencyMon has been analyzing your system for 0:39:01 (h:mm:ss) on all processors.




    ____________________________________________________________________________________________________ _____
    SYSTEM INFORMATION
    ____________________________________________________________________________________________________ _____
    Computer name: DESKTOP-0S4LJSE
    OS version: Windows 8 , 6.2, build: 9200 (x64)
    Hardware: ASUSTeK Computer INC., P7P55D-E PRO
    CPU: GenuineIntel Intel(R) Core(TM) i5 CPU 760 @ 2.80GHz
    Logical processors: 4
    Processor groups: 1
    RAM: 8190 MB total




    ____________________________________________________________________________________________________ _____
    CPU SPEED
    ____________________________________________________________________________________________________ _____
    Reported CPU speed: 2809 MHz


    Note: reported execution times may be calculated based on a fixed reported CPU speed. Disable variable speed settings like Intel Speed Step and AMD Cool N Quiet in the BIOS setup for more accurate results.




    ____________________________________________________________________________________________________ _____
    MEASURED INTERRUPT TO USER PROCESS LATENCIES
    ____________________________________________________________________________________________________ _____
    The interrupt to process latency reflects the measured interval that a usermode process needed to respond to a hardware request from the moment the interrupt service routine started execution. This includes the scheduling and execution of a DPC routine, the signaling of an event and the waking up of a usermode thread from an idle wait state in response to that event.


    Highest measured interrupt to process latency (s): 2752.939787
    Average measured interrupt to process latency (s): 3.868848


    Highest measured interrupt to DPC latency (s): 2713.929781
    Average measured interrupt to DPC latency (s): 1.068377




    ____________________________________________________________________________________________________ _____
    REPORTED ISRs
    ____________________________________________________________________________________________________ _____
    Interrupt service routines are routines installed by the OS and device drivers that execute in response to a hardware interrupt signal.


    Highest ISR routine execution time (s): 145.037024
    Driver with highest ISR routine execution time: storport.sys - Microsoft Storage Port Driver, Microsoft Corporation


    Highest reported total ISR routine time (%): 0.025945
    Driver with highest ISR total time: HDAudBus.sys - High Definition Audio Bus Driver, Microsoft Corporation


    Total time spent in ISRs (%) 0.039554


    ISR count (execution time <250 s): 667074
    ISR count (execution time 250-500 s): 0
    ISR count (execution time 500-999 s): 0
    ISR count (execution time 1000-1999 s): 0
    ISR count (execution time 2000-3999 s): 0
    ISR count (execution time >=4000 s): 0




    ____________________________________________________________________________________________________ _____
    REPORTED DPCs
    ____________________________________________________________________________________________________ _____
    DPC routines are part of the interrupt servicing dispatch mechanism and disable the possibility for a process to utilize the CPU while it is interrupted until the DPC has finished execution.


    Highest DPC routine execution time (s): 248.702029
    Driver with highest DPC routine execution time: CLASSPNP.SYS - SCSI Class System Dll, Microsoft Corporation


    Highest reported total DPC routine time (%): 0.113745
    Driver with highest DPC total execution time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation


    Total time spent in DPCs (%) 0.406193


    DPC count (execution time <250 s): 9160343
    DPC count (execution time 250-500 s): 0
    DPC count (execution time 500-999 s): 0
    DPC count (execution time 1000-1999 s): 0
    DPC count (execution time 2000-3999 s): 0
    DPC count (execution time >=4000 s): 0




    ____________________________________________________________________________________________________ _____
    REPORTED HARD PAGEFAULTS
    ____________________________________________________________________________________________________ _____
    Hard pagefaults are events that get triggered by making use of virtual memory that is not resident in RAM but backed by a memory mapped file on disk. The process of resolving the hard pagefault requires reading in the memory from disk while the process is interrupted and blocked from execution.


    NOTE: some processes were hit by hard pagefaults. If these were programs producing audio, they are likely to interrupt the audio stream resulting in dropouts, clicks and pops. Check the Processes tab to see which programs were hit.


    Process with highest pagefault count: chrome.exe


    Total number of hard pagefaults 15248
    Hard pagefault count of hardest hit process: 3996
    Highest hard pagefault resolution time (s): 1476851.217159
    Total time spent in hard pagefaults (%): 0.497120
    Number of processes hit: 48




    ____________________________________________________________________________________________________ _____
    PER CPU DATA
    ____________________________________________________________________________________________________ _____
    CPU 0 Interrupt cycle time (s): 134.596104
    CPU 0 ISR highest execution time (s): 145.037024
    CPU 0 ISR total execution time (s): 3.665128
    CPU 0 ISR count: 660559
    CPU 0 DPC highest execution time (s): 248.702029
    CPU 0 DPC total execution time (s): 35.394122
    CPU 0 DPC count: 8764873
    ____________________________________________________________________________________________________ _____
    CPU 1 Interrupt cycle time (s): 20.109127
    CPU 1 ISR highest execution time (s): 86.400854
    CPU 1 ISR total execution time (s): 0.038572
    CPU 1 ISR count: 6486
    CPU 1 DPC highest execution time (s): 177.257387
    CPU 1 DPC total execution time (s): 0.951958
    CPU 1 DPC count: 139024
    ____________________________________________________________________________________________________ _____
    CPU 2 Interrupt cycle time (s): 23.457102
    CPU 2 ISR highest execution time (s): 11.075116
    CPU 2 ISR total execution time (s): 0.000155
    CPU 2 ISR count: 29
    CPU 2 DPC highest execution time (s): 149.950872
    CPU 2 DPC total execution time (s): 0.806114
    CPU 2 DPC count: 126011
    ____________________________________________________________________________________________________ _____
    CPU 3 Interrupt cycle time (s): 22.884967
    CPU 3 ISR highest execution time (s): 0.0
    CPU 3 ISR total execution time (s): 0.0
    CPU 3 ISR count: 0
    CPU 3 DPC highest execution time (s): 146.754361
    CPU 3 DPC total execution time (s): 0.883925
    CPU 3 DPC count: 130435
    ____________________________________________________________________________________________________ _____

      My ComputerSystem Spec

  2.    25 Feb 2016 #2

    You are on the right track. High DPCs are usually driver problems.
      My ComputerSystem Spec

  3.    08 Mar 2016 #3

    Well it seems to be overclock related.

    I noticed that Voltage Offset was the first thing to blame.

    I changed to Manual and it works, though it can still happen, though i can't trigger is like i always could with Voltage Offset.
    It's weird cause i never experienced this before, it was after i had to re-clock my overclock cause it wasn't stable,
    and when it was stable i have this issue, no idea how to fix it
      My ComputerSystem Spec


 

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